What are the Aims of Kyoto protocol?

The common aim of the Kyoto protocol is that the ratified, industrialized countries must collectively reduce the level of greenhouse gases emissions by 5.2% of the level in 1990. The target year for this protocol is 2012.

The individual targets (reduction percentage) differ by region. For instance,

European Union – 8%

United States – 7%

UK – 12.5%

Japan – 6%

Some members are permitted to increase the level of greenhouse gases emission. For instance, Iceland can increase by 10% and Portugal by 27%.